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  1. Hace 15 horas · 1742: Benjamin Franklin invents the Franklin stove. 1745: Musschenbroek and Kleist independently develop the Leyden jar, an early form of capacitor. 1746: John Roebuck invents the lead chamber process. 1750s. 1752: Benjamin Franklin invents the lightning rod. 1755: William Cullen invents the first artificial refrigeration machine. 1760s